"in [with] regard to" ,"regarding","concerning", "about"

> Can i use them as a sentences like the followings?
> 1) I have set bunch of ideas as regard the problem.
> 2) With regard to the problem,i have set bunch of ideas.
> 3) I have set bunch of ideas with regard to the problem .
> 4) In respect to the problem, i have set bunch of ideas.
> Are those sentences correct?

There's no difference between these words or phrase ("in regard to" ,"regarding","concerning", "about", and "with regard to"). But it sounds weird when you mix formal words ("with [or in] regard to") with informal words such as "bunch of". And obviously whoever uses formal words should never write "i" when he means "I". Many Chinese and Indians have this horrible yet easily correctable mistake in not using capital letters when they should.

I don't think you can say "bunch of" not following "a"; "a bunch of" is correct but "bunch of" is probably not. "As regards" is heard. I'm not sure if anybody says "as regard".